Output will ramp up during 2018. The West Reef ore body has proven and probable mineral reserves of 1.09 million tonnes of gold at 13.93 grams per tonne of gold, the company says.

 

Exploration drilling is occurring with the goal of upping the annual production rate and extending the mine life.

 

Full-year 2018 production guidance for the Prestea complex, including Prestea Underground and the Prestea open pits, is 93,000 to 113,000 ounces of gold at a cash operating cost per ounce of $740 to $880.

 

"Achieving commercial production at Prestea Underground is an important milestone in Golden Star's transformation into a high-grade, margin-focused gold producer,” says Sam Coetzer, president and chief executive officer.

 

“It is also a significant historical moment for the Prestea community as it has been over 15 years since the mine was previously in commercial production.”